using System;

public class Program

{

    public static void Main()

    {

        FindMonth(FindN(n));

    }

    public static int FindN( int n)

    {

        do{

            Console.WriteLine("Input the number of the month: ");

            n = int.Parse(Console.ReadLine());

        }while(n > 12 || n < 0);

        return n;

    }

    public static void FindMonth(int FindN, int n)

    {

        if(n <= 2)

            Console.WriteLine("This is winter");

        if(n > 2 && n <= 5 )

            Console.WriteLine("This is spring");

        if(n > 5 && n <=8)

            Console.WriteLine("This is summer");

        if(n > 8 && n <= 11)

            Console.WriteLine("This is autumn");

        if(n > 11 && n<= 12)

            Console.WriteLine("This is winter");

    }

}